Safety-poet for coal-holes



W. FROST. SAFETY PORT FOR GOAL HOLES.

No. 12,623} Patented Apr. 3, 1856.

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To all whom it may mam.-

.l Be it known that I, SAMUEL W. FRos'r, of 4 Boston, in the countyof.Suffolk and State of Massachusetts, have inventeda new and usefulSafety- Port for Coal-Vaults; and I do hereby declare thatthesame isfully de- 3 scribed and represented in the following specification andthe accompanying drawings, 1etters,figures, andreferences thereof. Ofsuch drawings, Figure 1;, denotes a top view of the said safety port asit appears when closed. Fig. 2, is a topview of it when it is opened.Fig. 3, is an end elevation and F ig, isa vertical, central andlongitudi nal sectionof it,the lasttwoyiews showing the port in an openstate. Fig. 5, exhibits a sideviewofitasclosed. j r

In these drawings, A, exhibits a metallic frame, which has a rectangularor other proper form such as can'be inserted and j xed in the sidewalkof a street and directly over a coalvault formed beneath such. ThisframeA, is provided with a closing door or cover B, which turns onhinges or journals arranged at or near one end of it, (see a, a) so, asto enable thedoor to be raised from a 1 horizontal into an uprightposition.

j j So far as the frame and dooror cover is concerned it maybeessentially like what is commonly applied to coal vaults, except that itis rare to applythe cover to the frame by hinges. i

It is we ll known that in consequence of Joften happen, as persons areliable to fall into the vault or its mouth or opening,

fering severe' injury. The frequent recurrence of these accidents hasrendered itvery necessary to devise some means for their prevention, andthis, is the purpose of my improved safety port; j I

I combine with theiframe, A, or its opencomposedof two quadrantal arcs,G, G,

the cover beingleft off, serious accidents eitherbreaking their], legsor otherwise sufing and .the door, B, awsafety guard whichis' N E STATESPATENT OF ii SAFETY-PORT non COAL-HOLES.

Speeificati onof Letters Patent No. 12,623, dated April 3, 1855.

formed of metal or other suitable material. They are made to projectfrom the underside of the cover, B, and to extend into the opening ofthe frame, A, as seen in the drawings. j

. Neartheirlower corners they are connectedtogether by a crossbar orplate, D, which when the door, B, is elevated into a vertical positionis made to extend above the frame, A, as seen in the drawings, the'samebeing for the purpose of serving as a guard to prevent a persons footfrom slipping from the adjacent or frontend of the frame A, into thecoalvault. The guards, C, C, constitute guards to prevent a similaraccident when a person is approaching the coal vault opening from eitherside of it, the other or rear side of the opening being protected by thecover B. a

p In order to maintain the safety port open, a pin or bolt E, may beextended throughit and the frame A, as seen in Fig. 4. The cover, B, maybe furnished with a sliding bolt F, so that when it is closed such boltmay be shoved into the bolt hole made in the frame A.

' When the door, B, is elevated into a vertical position, coal may bethrown into the vault through the open space between the quadrants O, C,and the cross bar or guard D.

What I claim as my invention is- Combining with the door, B, and theframe, A, or the vault opening, a safety guard applied theretosubstantially in manner and for the purpose as hereinbefore specified.

In testimony whereof I have hereunto set my signature this twenty sixthday of February 1855. v l

SAML. W. FROST. Vvitnessesz H R. H. EDDY,

. F. P. HALE, J 3

